Kid goes to dentist, suffers side effects from medicine, and has dozen of spoof videos

Poor David went to dentist to have a tooth removed. In the car back home he is a bit out of reality because of the side effects of the anaesthesia. So far, so good. Not being enough, his parents post the video on Youtube, which gathers an astonishing 73 million plus viewers. And, not being enough, dozens of spoofs are posted (two of them here).